Solve the equation.-8.61 - 2.1t = 5.9(t + 4.6)
A. 4.46875
B. -2.31625
C. -4.46875
D. 2.31625
Answer: C
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Find the unit tangent vector of the given curve.r(t) = (3 + 2t3)i + (8 + 10t3)j + (6 + 11t3)k
A. T(t) = 
i + 
j + 
k
B. T(t) = 
i + 
j + 
k
C. T(t) = 
i + 2j + 
k
D. T(t) = 2i + 10j + 11k
Write the equation of the line in slope-intercept form.m = - 
, y-intercept 
A. y = 
x - 
B. y = 
x + 
C. y = - 
x + 
D. y = - 
x - 
Convert the given equation to parametric equations. Answers may vary.x2 + y2 = 49
A. x = 49 cos t, y = 49 sin t B. x = cos t, y = sin t C. x = 7 cos t, y = 7 sin t D. x = 7 sin t, y = cos t
Solve the problem.The number of acres in a landfill is given by the function 
where t is measured in years. How many acres will the landfill have after 10 years? (Round to the nearest acre.)
A. 1644 acres B. 1565 acres C. 3604 acres D. 3154 acres